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Molecular Weight of Step-Growth Polymers01:08

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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
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The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
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Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
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Updated: Jun 9, 2025

Microfluidic Devices for Characterizing Pore-scale Event Processes in Porous Media for Oil Recovery Applications
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在聚合物泡中操纵气泡动力学.

Lorenzo Miele1,2, Antonio Abate1, Kentaro Taki3

  • 1Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, University of Naples Federico II, Naples, Italy. edimaio@unina.it.

Soft matter
|October 29, 2024
PubMed
概括

研究人员开发了一种新的方法,通过在中间压力下暂停泡生长来控制聚合物发泡. 这种技术允许详细研究泡动力学,并有助于创建先进的泡材料.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物科学 聚合物科学
  • 化学工程是化学工程的重要组成部分.

背景情况:

  • 聚合物发泡通常涉及高压溶液的释放压力,产生多面体气泡.
  • 控制泡生长对于定制泡结构和特性至关重要.

研究的目的:

  • 通过暂停泡生长来控制聚合物泡的新方法的引入和验证.
  • 研究受控聚合物发泡过程中的基本物理现象.

主要方法:

  • 使用聚烯/ (PP/N2) 溶液的模型系统.
  • 实施非微不足道的压力历史,在减压期间进行中间暂停.
  • 观察和分析泡生长动态和相互作用.

主要成果:

  • 通过在中间压力下暂停,成功控制了泡生长.
  • 能够研究奥斯瓦尔德成熟,泡相互作用和凝聚.
  • 在受控条件下确定了不同的泡生长模式.

结论:

  • 拟议的方法为聚合物发泡过程提供了精确的控制.
  • 这种方法促进了对泡形成物理学的深入研究.
  • 该技术有可能开发出具有量身定制结构的新型泡材料.